DSH 439 Connectors and Openings

小米

广东安规检测
有限公司提供：

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

DSH 439 # ?( [1 B( L( @/ p  e 4 ]7 G- U8 K, v% C+ K: F

Connectors and Openings $ C4 `, P9 j* }+ Y

2.1.1.1

60950(ed.2);am1-am4 & 60950(ed.3)

Standard:
" M+ Q5 L6 S2 Q  s% s3 V# c& r7 qIEC 950 (1991) 2nd ed.,
Amdts.1(1992), 2(1993),
2 A  ?$ N1 X1 D6 F7 v* K3(1995), 4(1996);
IEC 60950, 3rd edition (1999)
Sub clause:
2.1.1.1
Sheet No.
439
! F2 l7 T4 Z1 O, l- S& ]  D0 ^0 hSubject:
Connectors and Openings
. D7 l0 \  a( DKey words:
Contact with hazardous
voltages, test finger
Decision taken at the
39th meeting 2002
Question:
Is it the intent of the fourth dash of Clause 2.1.1.1 which reads “-functional or basic insulation of
parts or wiring at hazardous voltages” to include a 2 mm air gap of clearance from the tip of the test
, `6 h2 C* Z( E! j" I+ Tfinger since that dash says “basic insulation” and 2mm or clearance is basic insulation? A
subassembly of IT equipment (e.g., uninterruptible power supply) has modular power supplies that
are located in operator accessible compartments and are removable by the user. If the power
+ Q( P. K# }( F! {supply is removed, the supply connector becomes exposed within the compartment. It is not
permitted to make a contact with a hazardous voltage not exceeding 1000 volts a.c. or 1500 volts
d.c. Is this requirement sufficient or is there a need for an additional gap between the part at
hazardous voltage and the tip of the test finger figure 19 of IEC 950 (figure 2A in IEC 60950)?
Decision:
Contact is verified by means of a test finger, figure 19 of IEC 950 (figure 2A of IEC 60950), which
shall not contact parts described above when applied to openings in the enclosure (compartment)
5 ]+ _7 r" R' v. v* F% r5 ~after removal of parts that can be detached by an operator, including fuseholders, and with operator
8 O3 |# j' V4 ]2 n* O# Haccess doors and covers open. It is permitted to leave lamps in place for this test. Connectors that
7 K1 q* v. F. ~: i$ \# [$ wcan be separated by an operator, other than plugs and socket -outlets complying with 60083, IEC
60309 and IEC 60320 shall also be tested during disconnection. Where contact is not permitted in
% }' S: G5 g* B' z6 uthe above tests, there is no requirement for a minimum air gap between the tip of the test finger and
' Y& _! V/ ~& ]9 vthe part at a hazardous voltage not exceeding 1000 V a.c or 1500 V d.c.

) {& c$ x$ j: u* w5 U; L# T